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MDCAT Chemistry Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | Which of the following compound is least reactive | HCHO CH3CHO CH3COCH3 C6H5CHO |
| 2 | Which of the following test is not given by aldehvde | 2. 4 DNPH test NaHSO3 test Tollen's test Sodium nitroprusside test |
| 3 | The red brown ppt. of Fehling solution and benedict solution tests are of | Ag Cu2O CuO AgBr |
| 4 | which of the following is not a symmetrical ketone | 4-heptanone Butanone Propanone 3-pentanone |
| 5 | Reactivity of carbonyl compounds is due to | Electrophilic carbon Less stearic hindrance Unsaturation of Co Polarity of bond |
| 6 | C=O and C=C bonds are differentiated by | Hybridization of C-atom Bond angles Ammonical AgNO3 <span style="font-size:11.0pt;line-height:115%; font-family:"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-bidi-font-family: "Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:ZH-CN; mso-bidi-language:AR-SA">Conc. HNO3</span> |
| 7 | Formalin is used as: | Fungicide Germicide Sterilizing of surgical instruments All three |
| 8 | Which one of the followings is resistant to oxidation under normal conditions | Methyl alcohol Acetaldehyde Ethyl alcohol Acetone |
| 9 | Acetone reacts with HCN to form a cyanohydrin. It is an example of | Nucleophilic addition Electrophilic substitution Electrophilic addition Nucleophilic substitution |
| 10 | Acetaldehyde cyanohydrin upon hydrolysis prodnces | Tartaric acid Malonic acid Formic acid Lactic acid |
| 11 | Formalin contains-------% alcohol. | 37 80 8 52 |
| 12 | Which of the following will undergo nucleophilic addition reaction more easily? | Aldehyde Alkene Aldehyde and ketone equally Neither aldehyde nor alkenes |
| 13 | What forces operate between ethyl group of ethyl alcohol and oxygen of water | H-bonding attractive forces repulsive forces dipole forces |
| 14 | Which will not react with phenol | NaOH Br2 KMn04/OH- Na |
| 15 | Alcohol is less acidie than phenol due to | higher ka value Instability of alkoxide ion stability of carbocation Stability of phenol |
| 16 | Formation of Picric acid from phenol needs heating, one possible reason for it is |
acidity of phenol e- donating nature of-OH acidity of picric acid e- with drawing effect of- NO2 |
| 17 | An electron with drawing group attached to e-position in phenol | makes it basic Stabilises the phenoxide ion decreases its basicity allows it to precipitate in aqueous solution |
| 18 | What is true about an alcohol and phenol | Both are more acidic than water Both react with NaOH Both produce CO2 with Na2CO3 Both, produce H2 with Na |
| 19 | Which reactant does hnof liberate water on reaction with alcohol | NH3 K2Cr2O7/15H2O HCI PCI3 |
| 20 | The compound that reacts the slowest in Lucas test | 1-Pentanol sec-butyl alcohol 3-Pentanol ter- butyl alcoho |
| 21 | Esterification of CH3COOH isreaction | Acid base Electrophilic Redox Nucleophilic |
| 22 | The alcohol that does not form curbonyl compound on oxidation | Ethanol iso-butyl alcohol ter-butyl alcohol neo pentyl alcohol |
| 23 | Tertiary alcohols have alpha bydrogens | 1 Zero 2 3 |
| 24 | 1, 3, 5-Pentanetriol has secondary carbon |
3 1 2 Zero |
| 25 | CH3CH2CH2OH--------A---------B Here B is | Propyne Propanal Propene Propane |
| 26 | The synthesis of ethene from ethyl alcohol is a reaction | Dehydration Polymerization Addition Substitution |
| 27 | The number of resonating structures of phenoxide ion are | 3 5 6 4 |
| 28 | The strongest conjugate base is | OH- CH3O- C6H5O- CH3COO- |
| 29 | One of the following can produce greater number of moles of ethyl chloride on reacting with escess of ethanol | PCI5 PCI3 HCI/ZnCl2 SOCI2 |
| 30 | During esterifcation, the alcobol molecule acts as: | Oxidizing agent Electrophile Reducing agent Nucleophile |
| 31 | The acidity of phenol is due to its | Nature of Benzene Double bond in benzene ring Natute of phenoxide ion Hydroxyl group |
| 32 | Reaction of alcohol with hydrogen chloride, in the presence of Zinc chloride yields | Ketone Carboxylic Alkyl halide Ester |
| 33 | Which one of the following is an appropriate indication of positive iodoform test? | Formation of H2O Brick red precipitate Release of H2 gas Yellow precipitate |
| 34 | Which one of the following groups is indicated when HCI is formed by reaction of ethanol with phosphorous pentachloride? | Amino group Halide group Hydroxyl group Hydride group |
| 35 | Which one of the following alcohol is indicated by formation of yellow crystals in lodoform tesr? | Methanol Ethanol Butanol Propanol |
| 36 | Primary, secondary aad tertiary alcohols can be identified and distinguished by | Lucas test lodoform test Baeyer's test Silver mirror test |
| 37 | The dehydration of ethyl alcohol with concentrated H2SO4 at 140°C gives | Ethene Alcohol Diethyl ether Carboxylic acid |
| 38 | Relative acidic strength of alcohol, phenol, water and carboxylie acid is | Carboxylic acid > Alcohol > Phenol > Water Carboxylic acid > Phenol > Water> Alcohol Water > Alcohol> Phenol > Carboxylic acid Phenol > Carboxylic acid > Alcohol> Water |
| 39 | ln ethyl alcohol, the bond that undergoes heterolytic cleavage most readily is | C-C C-O C-H O-H |
| 40 | Which of the following is soluble in water? | СН3ОН CCL4 CHCI3 CS2 |
| 41 | Which one of the following is more acidic | Phenol Carboxylic acid Alcohols Amines |
| 42 | Temperature required for the dehydration of ethanol into ethene in the presence of HaSOu is |
130°C 170°C 175°C 180°C |
| 43 | Which of the following alcohol is more soluble in H2O | Propanol Butanol Pentanol Hexanol |
| 44 | Phenol is completely soluble in water above | 25°C 62.3℃ 68.5°C 66.50°c |
| 45 | Phenol is colourless, crystalline and solid |
Hygroscopie Deliquescent Moistening Odourless |
| 46 | Phenol can be diatingushed from ethyl alcohol by all of the following reagents except | lodoforrn test Na Br2 /H2O NaOH |
| 47 | Which of the substance is not going to react the sodium metal: | Acetic acid Methanol Di methyl ether Ethanol |
| 48 | Which of the following alcohols is least reactive with respect to 0-H bond |
CH3OH CH-CH2-OH (CH3)2-CH-OH (CH3)3OH |
| 49 | The starting substance for the preparation of iodoform is any of the following, except | <div>СН3СН(ОН)CН3</div> CH3CH2ОН HCH2OH CH3COCH3 |
| 50 | Ethanol reacts with sodium metal to liberate | CO2 gas CO gas H2 gas Steam |
| 51 | Which of the following is more reactive where 0-H bonds break | P°alcohol T° alcohol S°alcohol Cannot be predicated |
| 52 | Alcohols of low molecular weight are: | Soluble in water Insoluble in water Soluble in water on heating Insoluble in all solvents |
| 53 | Which is most acidic? | H2O C2H5OH C4H9OH CH3-CH2-CH2OH |
| 54 | Which alcohol is most reactive towards sodium metal? | Ter Butyl alcohol n-Propyl alcolol Isopropyl alcohol Have same reactivity |
| 55 | A compound z' decolorizes bromine water and produces white ppt. The compound 'z'is | Alkane Alcohol Phenol Benzene |
| 56 | Ethyl alcohol reacts with PCL and produces: | Haloalkane Alkyl halide & H3PO3, Alkyl halide & POCl3 Alkyl halides &H3PO4. |
| 57 | Tertiary aleohols producewith acidified KMno, | Ketones Aldehydes Malonic acid Alkene |
| 58 | 2,4,6-Trinitrophenol is commonly called as | Phthalic acid Tartaric acid Malonic acid Picric acid |
| 59 | Which of the following undergoes easy dehydration? | 3-MethyIbutan-2-ol Ethanol 2.Methylpropan-2-ol Methanol |
| 60 | Which of the following reactions does not involve formation of carbocation? | SN1 and E1 El and E2 SN1 and SN2 E2 and SN2 |
